# A Much Bigger Piece Of Pi

#### timothy posted more than 11 years ago | from the mmmm-pi dept.

729
Punk_Rock_Johnny points to an AP story on Pi-obsessed Professor Yasumasa Kanada. A snippet from the story: *"Kanada and a team of researchers set a new world record by calculating the value of pi to 1.24 trillion places, project team member Makoto Kudo said yesterday. The previous record, set by Kanada in 1999, was 206.158 billion places."* Trillion!
"

## This first post... (-1, Troll)

## Anonymous Coward | more than 11 years ago | (#4832383)

## Whitney (-1, Offtopic)

## Anonymous Coward | more than 11 years ago | (#4832385)

## One simple question (2, Insightful)

## Tafs (624899) | more than 11 years ago | (#4832386)

## Re:One simple question (3, Funny)

## Nyh (55741) | more than 11 years ago | (#4832408)

Nyh!

## Re:One simple question (1, Insightful)

## Tafs (624899) | more than 11 years ago | (#4832445)

## Re:One simple question (2, Insightful)

## Dexter's Laboratory (608003) | more than 11 years ago | (#4832521)

## I'll go an fuk myself now kthx (-1)

## Sir Bard (605512) | more than 11 years ago | (#4832387)

## To quote The Rock (-1, Offtopic)

## Anonymous Coward | more than 11 years ago | (#4832390)

What's your favorite kind of

Is it... pumpkin... pi?

Is it... peach... pi?

Or is POONTANG pi?

## Well ... what is it? (3, Funny)

## LoudMusic (199347) | more than 11 years ago | (#4832392)

## Re:Well ... what is it? (0)

## Anonymous Coward | more than 11 years ago | (#4832410)

over one terabyteof disk space to hold that info.txt.## Re:Well ... what is it? (4, Informative)

## mfos.org (471768) | more than 11 years ago | (#4832514)

## Re:Well ... what is it? (-1, Troll)

## Anonymous Coward | more than 11 years ago | (#4832430)

## Re:Well ... what is it? (0)

## Anonymous Coward | more than 11 years ago | (#4832450)

## Re:Well ... what is it? (2, Interesting)

## WesG (589258) | more than 11 years ago | (#4832452)

1240000000000 characters * 8 bits/character = 9920000000000 bytes

9920000000000 bytes/ 1024000 = 9687500 MB

9687500 MB = 9.6875 TB

Thats a pretty darn big info.txt file!

I think I'll just use the 32 byte version for my SIG.

3.14

## Re:Well ... what is it? (0)

## Anonymous Coward | more than 11 years ago | (#4832470)

## Re:Well ... what is it? (0)

## Anonymous Coward | more than 11 years ago | (#4832522)

## Huge! (1)

## Wiseazz (267052) | more than 11 years ago | (#4832393)

## Re:Huge! (2)

## Subcarrier (262294) | more than 11 years ago | (#4832436)

## Re:Huge! (4, Funny)

## barnsleyBigUn (84793) | more than 11 years ago | (#4832491)

## I dunno about you, but... (5, Interesting)

## Hilleh (561336) | more than 11 years ago | (#4832395)

## Re:I dunno about you, but... (0)

## Anonymous Coward | more than 11 years ago | (#4832420)

## PiHex (1)

## Gudlyf (544445) | more than 11 years ago | (#4832433)

## Re:PiHex (1)

## Hilleh (561336) | more than 11 years ago | (#4832478)

## Re:PiHex (0)

## mkrist (586065) | more than 11 years ago | (#4832495)

PiHex is now finished. You can still download the PiHex client, but it won't do much since it needs to communicate with the server (which no longer exists).This was found at the download page.

## OK, now this is overkill (2)

## Rhinobird (151521) | more than 11 years ago | (#4832397)

## Re:OK, now this is overkill (4, Insightful)

## DoctorNathaniel (459436) | more than 11 years ago | (#4832461)

size of the proton: ~ 1 fm = 10^-15 m

age of the universe: ~15 Gyr

speed of expansion ~ c = 3 x 10^8 m/s

gives:

proton/cosmic radius ~ 10^-42

So you need about 40 places for this. Of course, you might want to calculated it to the Plank scale, so maybe tack on a few more.. say 100 for safety. Yes, a trillion digits does seem a bit like overkill.

## Re:OK, now this is overkill (2)

## sielwolf (246764) | more than 11 years ago | (#4832523)

When multiplying a*b = c, the place of c is the lesser place value of a OR b MINUS one.

So no matter what, to be accurate/not cheat, you are slowly losing granularity as you churn out the calculations.

If there is a God, I hope that he DOES have Pi out to some ludicrous number of digits. I don't want to see the round off error of those calculations

## Re:OK, now this is overkill (0)

## Anonymous Coward | more than 11 years ago | (#4832486)

## If Pi were made into a classic video game... (3, Funny)

## Jace of Fuse! (72042) | more than 11 years ago | (#4832402)

heh.

## YAY! (1)

## b0ycheese (587473) | more than 11 years ago | (#4832404)

## Ahhh (0)

## Anonymous Coward | more than 11 years ago | (#4832405)

## How? (2, Interesting)

## PoiBoy (525770) | more than 11 years ago | (#4832406)

## How To Calculate Pi (3, Interesting)

## DrDevil (90608) | more than 11 years ago | (#4832441)

(1 - 1/3 + 1/5 - 1/7 + 1/9 - 1/11 +

Obviously the more iterations you do, the closer you will be to the 'true' value of Pi.

## Re:How? (3, Informative)

## Gudlyf (544445) | more than 11 years ago | (#4832458)

## Re:How? (3, Funny)

## Speare (84249) | more than 11 years ago | (#4832488)

Here's a program written in BrainF*ck to calculate. b [harvard.edu]

pi: http://www.people.fas.harvard.edu/~jafowler/pi/piHere's the analysis of the program [harvard.edu], and a link to what the Turing-inspired BrainF*ck [catseye.mb.ca] programming language is about.

## Re:How? (0)

## Anonymous Coward | more than 11 years ago | (#4832494)

For instance Walli's formula:

(Pi/2) = (2*2)/(1*3)*(4*4)/(3*5)*(6*6)/(5*7)...

Or

Pi = SUMk=0 to infinity 16-k [ 4/(8k+1) - 2/(8k+4) - 1/(8k+5) - 1/(8k+6) ]

by David Bailey, Peter Borwein, and Simon Plouffe

The reason this pi formula is so interesting is because it can be used to calculate the N-th digit of Pi (in base 16) without having to calculate all of the previous digits!

See http://www.math.hmc.edu/funfacts/

## Re:How? (1, Interesting)

## Anonymous Coward | more than 11 years ago | (#4832510)

echo "scale=500;4*a(1);"|bc -l

in a shell, where 500 is the number of decimals you wish.

## Re:How? (0)

## Anonymous Coward | more than 11 years ago | (#4832512)

## no purpose in math? (1)

## slavemowgli (585321) | more than 11 years ago | (#4832407)

math?## Re:no purpose in math? (2)

## nusuth (520833) | more than 11 years ago | (#4832515)

As for math, I don't think there is anything at all learnable from actual digits of pi. We know they neither end nor repeat. Actual values are just trivia. It could as well have been 3.76421403038164659... and nobody would care.

## The 1.24th trillion digit of pi is .. (5, Funny)

## gargle (97883) | more than 11 years ago | (#4832411)

## OMG! That's 4+2 !!!!! (5, Funny)

## Anonymous Coward | more than 11 years ago | (#4832457)

## Re:The 1.24th trillion digit of pi is .. (0)

## Jacek Poplawski (223457) | more than 11 years ago | (#4832475)

## Re:The 1.24th trillion digit of pi is .. (2, Funny)

## edbarrett (150317) | more than 11 years ago | (#4832526)

Bert: My favorite number is 6.

Ernie: Bert, nobody's favorite number is 6!

## math question about pi (3, Interesting)

## selectspec (74651) | more than 11 years ago | (#4832412)

## Re:math question about pi (5, Funny)

## Moeses (19324) | more than 11 years ago | (#4832419)

## Re:math question about pi (3, Funny)

## isorox (205688) | more than 11 years ago | (#4832507)

otherthen base Pi.You can write it as 0.5 (base 2Pi)

## Re:math question about pi (1)

## Fruit (31966) | more than 11 years ago | (#4832518)

You'd have to write it as 10 then :)

## Re:math question about pi (4, Informative)

## DJPenguin (17736) | more than 11 years ago | (#4832424)

## Re:math question about pi (2, Interesting)

## agdv (457752) | more than 11 years ago | (#4832455)

No - pi is irrationalOkay, I've heard this many times, and I don't doubt it's true. But are there any simple elegant proofs of this (like the one for proving that the square root of 2 is irrational), or are the proofs very involved, or are there no proofs at all except "well, nobody has found the end yet"?

## Re:math question about pi (5, Informative)

## Dunark (621237) | more than 11 years ago | (#4832464)

## Pi are ROUND! Cornbread are square! (1)

## drdanny_orig (585847) | more than 11 years ago | (#4832524)

## Re:math question about pi (2)

## SpaceLifeForm (228190) | more than 11 years ago | (#4832476)

## You know ... you would think ... (0, Flamebait)

## SuperDuG (134989) | more than 11 years ago | (#4832413)

Pi is represented usually by a fraction or relatively simple equation, it's just the division that makes the number go on for ever. I don't understand why we must break pi down into a decimal when it can already be represented by a simple fraction. Figuring pi beyond the ten thousandth spot is overkill.

However, it has always been a bragging right for many a geek to find as many places in pi as possible, and now that has been accomplished. I also have created a new world record. Taking the equation two divided by three I have found the 100000 trillionth digit ... it's "3" ...

## Re:You know ... you would think ... (0)

## Tafs (624899) | more than 11 years ago | (#4832472)

veryimpressed.## Re:You know ... you would think ... (2)

## SuperDuG (134989) | more than 11 years ago | (#4832487)

## Re:You know ... you would think ... (2, Informative)

## mdwh2 (535323) | more than 11 years ago | (#4832480)

Pi is represented usually by a fraction or relatively simple equation, it's just the division that makes the number go on for ever. I don't understand why we must break pi down into a decimal when it can already be represented by a simple fraction.This is a bit misleading - since Pi is irrational, representing it as a fraction (eg, 22/7) is only an approximation. Representing these divisions usually produce an infinite expansion in decimal (if that's what you mean by "it's just the division that makes the number go on for ever"), but that number is recurring, and thus easy to work out any arbitrary digit since it repeats. This article is about working out the true value of Pi, whose decimal expansion is infinite and non-recurring, and this has nothing to do with divisions.

Taking the equation two divided by three I have found the 100000 trillionth digit ... it's "3"Yes.. working out digits of rational numbers is slightly easy than irrational ones. Irrational numbers, by definition, can't be represented as the ratio of two integers.

## No, pi is irrational (5, Interesting)

## smcv (529383) | more than 11 years ago | (#4832504)

Pi is represented usually by a fraction or relatively simple equation, it's just the division that makes the number go on for ever.Nope. If pi was rational (a fraction), it wouldn't go on for ever without repeating. (reference [wolfram.com])

In fact pi is irrational, i.e. there are no integers p, q such that pi = p / q. (proof [clemson.edu])

You can

approximatepi as a fraction, which is what projects like this do. (pi is approximately equal to 31/10, or 314/100, or 31416/1000, or## Re:You know ... you would think ... (1)

## Pius II. (525191) | more than 11 years ago | (#4832505)

BTW, under http://pi314.at/math/irrational.html is proof that pi isn't a rational number.

## Re:You know ... you would think ... (2, Funny)

## Anonymous Coward | more than 11 years ago | (#4832517)

Taking the equation two divided by three I have found the 100000 trillionth digit ... it's "3"Actually, if you divide two by three the 100000 trillionth digit would be "6"

## More Please (2)

## dirkdidit (550955) | more than 11 years ago | (#4832415)

A Much Bigger Piece Of PiDoesn't matter, I still want seconds. With ice cream!

## Why? (2)

## SlamMan (221834) | more than 11 years ago | (#4832416)

## How to calculate PI yourself (5, Funny)

## renosteve (628802) | more than 11 years ago | (#4832422)

Here's how it works. You'll need several boxes of toothpicks. Get a large piece of chart paper, and draw parallel lines on it, from one side to the other. The lines should be separated by a distance just slightly larger than the length of a toothpick.

From a height of about one metre, drop a measured number of toothpicks onto the chart paper, so that they all fall randomly somewhere on the paper. Count how many toothpicks are touching a line (or would be, if they weren't resting on another toothpick).

Repeat this process as many times as you can. Lots of people can do it at once. All that's important is that, each time you drop some toothpicks, you write down how many you dropped, and how many of those ended up touching a line. When you're done, find a total for each quantity.

You now have all the numbers you need to calculate Pi:

Now here's the formula you need to calculate Pi:

Fill them in the formula, and work out your own value of Pi!## Re:How to calculate PI yourself (2)

## DJPenguin (17736) | more than 11 years ago | (#4832440)

## Re:How to calculate PI yourself (5, Funny)

## Jacek Poplawski (223457) | more than 11 years ago | (#4832485)

One way to calculate for yourself the value of pi is to drop a lot of toothpicks onto a large piece of paper that has lines drawn on it!You are toothpicks seller, aren't you?

## The 1.24 trillionth digit? (0)

## Anonymous Coward | more than 11 years ago | (#4832423)

## Re:The 1.24 trillionth digit? (0)

## Anonymous Coward | more than 11 years ago | (#4832437)

(Actually, I have no idea, but I figure my odds are 1 in 10 of being right.)

## I like this quote: (2)

## big_groo (237634) | more than 11 years ago | (#4832425)

Figuring out pi to much more than about 1,000 decimal places serves little purpose in math or engineeringAnd in 100 years it'll be:

Figuring out pi to much more than about 100,000 decimal places serves little purpose in math or engineering

## WOMBAT!!! (0)

## Anonymous Coward | more than 11 years ago | (#4832426)

CALCULATES MATHEMATIC GEEK STUFF???

NERD!!!!!!

## Faking it ... (3, Funny)

## Anonymous Coward | more than 11 years ago | (#4832428)

## I know its irrational.... (1)

## christurkel (520220) | more than 11 years ago | (#4832435)

## Signature of God? (5, Interesting)

## Speare (84249) | more than 11 years ago | (#4832438)

In the book version of

Contactby Carl Sagan, but skipped in the Jodie Foster movie, was the notion that the aliens had discovered proof that the universe was created by a higher intelligence. A God or society of Gods far higher and more advanced than the aliens. The whole point of dragging Human-kind to that remote beach to talk with daddy was to tell Human-kind that it was time for them to look for God's signature on this universe.As any artist, the creator signed the creation. Where? Deep into the insignificant but irrefutably valid digits of several of the fundamental mathematical constants such as

piande.The main character finds one of the signatures at the end of the book: if calculating digits of

piin base 11, after a few million or billion places, a 500x500 digit span is almost entirely zeros. If the span was rendered as a square of pixels, the non-zero digits drew a perfect circle inscribed in the square. A circle in a square. The key concept definingpi, in the digits ofpiitself. The whole way the universe works is affected by that constant, so any such 'design' in it has, if you pardon the pun, a transcendental import.Why base 11? It's left to the reader to decide, but I expect Sagan wrote it because it is considered one of the possible designs of the universe, one of the string theories is based on an 11-dimensional all-inclusive physics model. As the alien explains to the main character, it wouldn't be base 10, because what's the likelihood that the creator also happened to have ten fingers?

## Re:Signature of God? (0, Interesting)

## Anonymous Coward | more than 11 years ago | (#4832459)

after a few million or billion places, a 500x500 digit span is almost entirely zerosFirst off that is so stupid because it is totally impossible. How can you be doing the long division and get zero for every digit (with an occasional 1). Makes no sense. BAH!!

## Re:Signature of God? (1)

## whovian (107062) | more than 11 years ago | (#4832493)

e^{\pi i} + 1 = 0

## Re:Signature of God? (2)

## bokmann (323771) | more than 11 years ago | (#4832520)

## I love this Quote (5, Funny)

## Rhinobird (151521) | more than 11 years ago | (#4832439)

Um, you have 1.24 trillion digits of pi. I think you can begin a statisticall analisys now.

## Pi! (0)

## CommieBozo (617132) | more than 11 years ago | (#4832443)

## Accuracy? (2)

## Junior J. Junior III (192702) | more than 11 years ago | (#4832444)

I'm not trolling, I'm just not mathematician enough to just know.

## Re:Accuracy? (3, Informative)

## Zapman (2662) | more than 11 years ago | (#4832511)

See:

http://www.math.hmc.edu/funfacts/ffiles/20010.5

You can figure out what any digit of pi is, without bothering with any of the preceding digits.

This only does base16, however I remember seeing one that was for base10 as well. When in doubt, google.

## Irrational (pi != 22/7) (2, Troll)

## Omkar (618823) | more than 11 years ago | (#4832446)

## Pi (0)

## Anonymous Coward | more than 11 years ago | (#4832447)

## Pi to Binary (0)

## Anonymous Coward | more than 11 years ago | (#4832449)

## obligatory Southpark refference (0)

## Anonymous Coward | more than 11 years ago | (#4832453)

## I'll be impressed when he memorizes it... (2)

## JohnDenver (246743) | more than 11 years ago | (#4832463)

I once hear of a guy who memorized 30,000 numbers!"You can bet your ass the room filled up with Louis Skolnick type laughter, along with ribbing along the lines of, "Once I hit 30,000 I stop counting..."That was BEFORE we had beowulf cluster jokes!

## Quiz (1, Troll)

## Jacek Poplawski (223457) | more than 11 years ago | (#4832465)

a) calculating another piece of PI

b) running miss Setia Thome software

c) installing Windows

Share your opinion.

## Uh oh... (1)

## NiKnight3 (532580) | more than 11 years ago | (#4832468)

## Pi info (4, Informative)

## Omkar (618823) | more than 11 years ago | (#4832471)

## fuderal gov't. "action"? (0)

## Anonymous Coward | more than 11 years ago | (#4832477)

how come no story about the big raids on *.*software.com? sounds like a debacle. robbIE's waitin' for the "facts" know DOWt.

sad on tv they'se working for the fuds, & the villians, at the same time. yet another feet of modem takeknowledgee? or just more fuderoll bungling? there MUST be a story. some of US .conspiracy buffs are intrigued (not surprised) at the implications.

(:>L0L [trustworthycomputing.com]## Oops! (1)

## PhipleTroenix (240551) | more than 11 years ago | (#4832479)

## Precise (1)

## dark-br (473115) | more than 11 years ago | (#4832483)

## the right answer (1)

## svachi (552210) | more than 11 years ago | (#4832484)

## hitting the end (1)

## buttahead (266220) | more than 11 years ago | (#4832490)

## Form Fitting Condoms (1)

## cyberlotnet (182742) | more than 11 years ago | (#4832497)

Trojan 2003 condoms in YOUR Size

( We use the trillion place pi method to ensure out condoms are the most precise sized condoms out there, Other companys claim better fit but only use a the million place pi method to compute there condom size )

## ummm timothy ... (2)

## SuperDuG (134989) | more than 11 years ago | (#4832498)

(c) Austin Powers and MPAA and protected by the DMCA

## A more straightforward approach (1)

## Waffle Iron (339739) | more than 11 years ago | (#4832499)

## Not sure Pi is irrational? (1)

## SashaM (520334) | more than 11 years ago | (#4832500)

Hmm, quoting the article:

Among the most puzzling mysteries: Mathematicians are pretty sure, but still cannot prove conclusively, that the numbers following 3.141592 occur randomly.Last time I checked, we were pretty sure Pi was irrational, no?

## IN SOVIET RUSSIA (0)

## Anonymous Coward | more than 11 years ago | (#4832506)

## Woopdie doo! (1)

## sopwath (95515) | more than 11 years ago | (#4832508)

## why? (1, Insightful)

## Anonymous Coward | more than 11 years ago | (#4832516)

## Hidden humor (2)

## mattr (78516) | more than 11 years ago | (#4832519)

And well it should! For it is from the Seattle Post-Intelligencer, whose logo is a globe with the initials "P-I". Someone should get those guys to put it on their top page.

Perhaps they held back since it also was posted exactly 61 years after the invasion of Perl Harbor. Oh well.

FWIW, I've been hoping desperately that they'd find some neat geometrical patterns in Pi. My guess is that the reason the mathematicians cannot prove that all those digits are random is that they aren't.. they are just using an extremely good hash algorithm to encrypt the darn thing.